Viruses, viroids, & prions avg person catches a cold 2 to 3 times per year. Other parasitic particles: viroids and prions. Define viroid: any of two families (pospiviroidae and avsunviroidae) of subviral particles that consist of a small viroid in a sentence. Title: viruses, viroids, and prions author: cheryl massengale last modified by: cmassengale created date: 8/9/2005 9:20:58 pm document presentation format. Viruses, viroids, and prions chapter 10 dr ackman viruses living or not living inert outside of living host cause infection and disease obligate intracellular. Chapter 13 viruses, viroids, and prions presentation ideas in docslide.
Viroids: an infectious entity affecting affecting plants it is made of a single rna strand without a protein coat viruses, viroids, and prions. What causes a viral infection three kinds of disease causing organisms: viruses, viroids and prions. What is a prion download pdf copy by sally robertson, bsc and viroids, a new term prion was proposed to denote a small proteinaceous infectious particle which is resistant to inactivation by most procedures that modify nucleic acids. Prions do not have any dna or nucleic acid, but viroid's containboth this is the primary difference between the two.
1 viruses, viroids, and prions chapter 13 bio 220 fig 131 characteristics of viruses very, very small (filterable) obligatory intracellular parasite. Viruses, viroids, and prions 13 2016 pearson education, inc hepatitis b pox virus 2016 pearson education, inc general characteristics of viruses. Viroids are the smallest infectious pathogens known they are composed solely of a short strand of circular, single-stranded rna without protein coat.
Chapter 13 viruses, viroids, and prions biology 1009 microbiology johnson-summer 2003. Viroids were originally thought to be either the evolutionary precursors or degenerate decendents of conventional viruses however, viroids' lack of sequence or structural similarity and lack of coding rna ruled out this theory. Learning objectives describe viroids and their unique characteristics describe virusoids and their unique characteristics describe prions and their unique characteristics. If you're seeing this message, it means we're having trouble loading external resources on our website if you're behind a web filter, please make sure that the domains kastaticorg and kasandboxorg are unblocked main content to log in and use all the features of khan academy, please enable.
Viroids are small, circular, single-stranded molecules of infectious rna that cause several plant diseases prions are infectious protein particles responsible for a group of transmissible and/or . What is the difference between prions and viruses update cancel promoted by yahoo search rheumatoid arthritis treatment what is the difference between virus, viroids and prions how do prion diseases develop can a virus get infected by a virus.
While we tend to think of things that can actively kill us as being living entities, the fact is that non-living entities can actively kill us, as. Virus vs prion infectious diseases are caused by pathogens such as viruses and bacteria, and these pathogens are organisms made up of a large number of. Viruses, viroids, and prions copyright cmassengale are viruses living or non-living viruses are both and neither they have some properties of life but not others for example, viruses can be killed, even crystallized like table salt. Microbiology: an introduction, 12e (tortora) chapter 13 viruses, viroids, and prions 131 multiple-choice questions 1) how do all viruses differ from bacteria a) viruses are filterable b) viruses are obligate intracellular parasites c) viruses do not have any nucleic acid d) viruses are not.